From 15318cad33835e4e2dc620d033e43cd930676cdd Mon Sep 17 00:00:00 2001
From: kergoth <kergoth>
Date: Fri, 25 Jan 2002 22:14:26 +0000
Subject: Initial revision

---
(limited to 'noncore/apps/tableviewer/db/datacache.h')

diff --git a/noncore/apps/tableviewer/db/datacache.h b/noncore/apps/tableviewer/db/datacache.h
new file mode 100644
index 0000000..c5dc637
--- a/dev/null
+++ b/noncore/apps/tableviewer/db/datacache.h
@@ -0,0 +1,130 @@
+/**********************************************************************
+** Copyright (C) 2000 Trolltech AS.  All rights reserved.
+**
+** This file is part of Qtopia Environment.
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.
+**
+** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+**
+** See http://www.trolltech.com/gpl/ for GPL licensing information.
+**
+** Contact info@trolltech.com if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+/*
+ * This file is used to load the xml files that represent the database.
+ * The main requirment for said file is each data entry must contain a key,
+ * otherwise any other data headings are allowed.
+ */
+
+#ifndef __DATACACHE_H__
+#define __DATACACHE_H__
+
+#include <qstring.h>
+#include <qvector.h>
+#include "common.h"
+
+class DBStore;
+
+/*! Abstract class that defines how database stuff can be accessed */
+class DBAccess {
+public:
+
+//    DBAccess(DBStore *d) { dstore = d; }
+    virtual ~DBAccess() {}
+
+    virtual QString type() {
+        return QString();
+    }
+
+    virtual bool openSource(QIODevice *) {
+        qWarning("DBAccess::openSource not yet implemented");
+        return false;
+    }
+
+    virtual bool saveSource(QIODevice *) {
+        qWarning("DBAccess::saveSource(QString) not yet implemented");
+        return false;
+    }
+
+protected:
+    DBStore *dstore;
+    QString source_name;
+};
+
+class DBStore {
+public:
+    DBStore();
+    ~DBStore();
+
+    bool openSource(QIODevice *, const QString &source);
+    bool saveSource(QIODevice *, const QString &source);
+
+    // Add an item
+    void addItem(DataElem *);
+    void addItemInternal(DataElem *);
+	void removeItem(DataElem *);
+
+    // Set the name of the database
+    void setName(const QString &name);
+
+    // Get the name of the database
+    QString getName();
+
+    KeyList *getKeys();
+    void setKeys(KeyList *);
+
+    /*! gets the number of fields defined in the database */
+    inline int getNumFields() {
+       return kRep->getNumFields();
+    }
+
+    /*! gets the index of a key given its name */
+    inline int getKeyIndex(QString qs) {
+        return kRep->getKeyIndex(qs);
+    }
+
+    /*! gets the type of a key given its index */
+    inline TVVariant::KeyType getKeyType(int i) {
+        return kRep->getKeyType(i);
+    }
+
+    /*! gets the name of a key given its index */
+    inline QString getKeyName(int i) {
+        return kRep->getKeyName(i);
+    }
+
+// Access functions.. iterator type stuff
+
+    void first();
+    void last();
+
+	bool next();
+	bool previous();
+
+	DataElem* getCurrentData();
+
+private:
+    /* does the work of freeing used memory */
+    void freeTable();
+	QString name;
+
+    QVector<DataElem> master_table;
+    DBAccess *archive;
+
+    KeyList *kRep;
+
+    unsigned int number_elems;
+    unsigned int table_size; /* should always be a power of 2 */
+    bool full; /* since because we are using an int for indexing there is 
+                  an upper limit on the number of items we can store. */
+    unsigned int current_elem;
+};
+#endif
--
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